Henry f



H. F. SHAW.

LATHE HEAD.

Patented Sept. 8, 1868.

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HENRY F. SHAW, OF WEST ROXBURY, ASSIGNOR TO JAMES A. WOODBURY ANDSOLOMON S. GRAY. OF BOSTON, MASSACHUSETTS;

'- Letters Patent No. 81,952, dated September 8,1868.

IMPROVEMENT m LATHE-HEADS.

Be it lgnown that I, HENsY F. SHAW, of West Boxbnry, in the county ofNorfolk, and State of Massachusetts, have i'nvcnteda new and usefulImprovement in Engine-Lathe Head, of which the following is a full,clear, and exact description, reference being had'to the accompanyingdrawings, makin'ga part of this specification, in which- Figure 1represents a longitudinal vertical section of an engine-lathe headembodying my invention.

Figure 2 is a transverse vertical section, showing the toothed cylindersin gear.

Figure 3 is a.view of the same, showing the cylinders out of gear witheach other. V

Figure 4. is a view of the device used for changing the relativeposition of the gear-cylinders.

Figures 5 and 6'are views of a device, which may be applied for takingup the wear of the eccentric-sleeve .or the collar.

The nature of my invention consists in the application to anengine-lathe head of a diflisrential gear, in which the internal andexternal gears are so arranged and connected that the smaller orexternal gear may have a movement in reference to a nominally fixedpoint, and is so combined and arranged with respecttto other parts asnot to admit of a rotary movement, but so, nevertheless, as to cause arotary motion of the larger or internal gear-cylinder on its axis; andby means of a simpleadjustmcnt of an eccentric-sleeve, onwhich thesmaller gear-cylinder works, the latter may be thrown into a positioneccentric to and in gear withthe larger gear-cylinder, and also.out ofconnection with the same, thus allowing the larger or internalgear'cylindcr a free rotating motion, while the external gear-cylinderremains stationary.

The velocity of the larger gear-cylinder is regulated the relativenumber of teeth on the same to those on the smaller or external gear. Y

Referring to the dran'ings A represents the frame, in which is properlyjonrnalled the shaft B. Upon the shaft B'is placed the conspulley G, onthe face of which, and forming a part of the same, is an eccentriccylinder' or sleeve, d. Upon the fixed eccentric-cylinder d works amovable. eccentric-sleeve or collar, 0, provided on the and towards thecone-' pulley C, with a flat projecting piece, a, which fits within acorresponding recessiiu one side of a circular disk orplate P. The diskP is of a larger diameter than'the face of the cone-pulley G, and on theside towards thesaid puliey is attached a fiat spring, S, provided witha pin, 0, which is made to'engage inone of two holes placed on oppositesides of the centre of the inner face of the cone pullcy C, for a.purpose hereinafter describ d The spring S projects above the edge ofthe disk P, so as to allow it to be easily operated. i

E represents the smaller or internal gear-cylinder, and is fitted snuglyupon the collar c, hot so as to .allow the latter to rotate freely inthe said cylinder. To the gear-cylinder E is attached an arm, F, whichextends downwards, and, at its lower end, is provided with a slot thatfits over a pin,f, by which the cylinderqgear is prevented from having arotary motion; but is allowed an oscillating motion corresponding to theunited cocontricity of the sleeves c and cl. V

D represents the larger or internal gear-cylinder, which is made fast tothe shaft B, amLrotates yith it;

The sleeves c andd are so arranged that, when their eccentric or thickerportions willboth be on the same side, they will operate on thegear-cylinder. E to throw the latter into connection with thecylinder-gear D, as will appear in figs. 1 and 2, when the shaft B isrotated.

When it is desired to throw the external out of connection with theinternal gear, the pinp is Withdrawn from one of the holes by moving thespring S, and the cone-pulley is moved half way round until the, pindrops into the hole there provided, which bringsthe eccentric portionsof the-sleeves c and d opposite each other on the shaft B, as shown infig 3, thus mnking'*the 'gear'sD and E concentric with each other, anddisconnecting the gears.

The cylinder-gear E will then remain stationary, and also the gear D,while the pulley G revolves loosely on shaft B.

The sleeve d and collar emey both be bevelled, in order to allow for.wear of the same.

Figs. 5 and 6 represent a device which may be applied to compensate forthe weal-of the sleeves,

v To, the sleeve k ai'e attnched three slotted arms, 1;, through whichpass screws, m, into the sides oE'the cylindex- Ii, the latterrepresenting the external gear-cylinder E of fig. 1. On the screw m is,a shoulder, between which and the head is'held the arin n, so that byturning the screws the sleeve It will be moved in or out evenly, asrequired.

What I claim as new, and desire to secure by Letters Patent, is,-

1. The combination of the gears D and E, the disk P, "having thespring-pin p and eccentric-sleeve e attached thereto, and thepulley-block 0, provided with the eccentric-sleeve d, alL arrangedsubstantially in the manner and for thepnrpose specified. v

2. The combination of the pulley-block 0, provided with the cam-sleeved, disk P, and eccentric-collar a, catch S, and gear-wheel E,substantially as and fonthe purpose set forth.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY F. SHAW.

Witnesses:

' J. H. AnAMs,

L DYER.

